Screw-driving machine



Sept, 11, 1928.

a. c. BROWN ET AL SCREW DRIVINQ MACHINE Filed Nov. 2, .1925 '7 SheetsSheet 2 2m GCBmwnandG/E'MNulty Sept. 11, 1928.

1,683,815 G. c. BROWN ET AL SCREW DRIVING MAcH-INE Filed Nov. 2, 1-925'7 Sheets-Sheet 5 V a gwuvntoz Se t. 11, 1928.

G. c. BROWN ET AL SCREW DRIVING MACHINE Filed Nov. 2

m m M GCBmwn and GFMSA/UIZZI 8g, v h a ii/M Sept. 11, 1928.

G. 0. BROWN ET AL,

SCREW muvme MACHINE v .7 Sheets-Sheet 5 File Nov. 2. l925 jwuantowGCBmwn andGEMWulgy Sept. 11, 1928.

'7 Sheets-Sheet 6 G. C. BROWN ET AL SCREW DRIVING MACHINE Filed Nov. 2,1925 Patented. Sept. 11, 1928.

1 N TED" STATES on 6. BROWN A111) onnoomr r. MGNIVJLTY, or MASSILLQN,omo, nssmnons rro rm:

REYNOLDS-MACHINE COMPANY, OF MASSILLON, OHIO,

SCREW- RIVING macnmn.

pphcation filed November 3, 1925. Serial No 55,223.

The invention relates to mechanism for driving screws andmoreparticularly to-an automatic n mltiple spindleinacliine.

The object ofthe present improvement is .5 to provide a screw drivingmachine having a plurality of 'driving. spindles and provided with oneor moremagazines which simultaneously feed screws to the severalspindles, all of the spindles being simultaneously opera-ted 10 todrivethe plurality of screws atone time; means being provided forcompensating for variation in the lengths of time to drive the severalscrews; a work carryingtable being provided upon the machine andarranged to L be automatically raised as the mechanism is put intooperation. j i y e d An embodiment of the invention is illus- V hintedin the accompanying drawings, in which} 7 v v Figure l is a frontelevat-ionfof the improved screw driving machine; Fig. 2, asideelevationof the same with parts broken away; i

Fig. 3', a plan section on the line 3-3, Fig.- ure 1, upon a largerscale;

Fig. 4, a vertical sectional view through one of the chucks showing thecompensating meansupon the driving spindle;

Fig. 5, a plansectional view of one of the screw magazines and themultiple feeding mechanism; V I 1 Fig. 6, a vertical sectional view ofthe same;

Fig.7, a detail perspective view ofithe' es,- capem ent mech anism,showing a fragmentary portion of the feed magazines; 5

Fig. 8, a detail perspective view blade;. 7 I

Fig. 9, a plan view of the escapement meclt anism in the cut-offposition; I Fig. a similar view of theiescapement mechanism in theleasinga screw, an s Fig. 11, aperspcctive view of the gearing by meansof'which the several parts ofthe mechanism are driven. r e

Similar numerals refer to corresponding partsthroughout thedraiwmgs' i iThe mechanism is carried bya standard '1 having the enlargedbase portion.2, upon the rear portion of which maybe mounted the motor-3 fordrivingthe mechanism. A pin:- ion 4, uponthemotor shaft 5 meshes with agear 6, upon a hort horizontal shaft 7, said shaft heing provided with abevel pinion 8 of the cam giosition just prior to ref meshing with abevel pinion .9 upon-the vertical shaft 10 which extends i' piv'ardthrolugrh the hollow standard 1, thebevelpinionsbeirig preferablylocated .withina housing 12'. y Q iAlthough any desired number ofscrewsmay be simultaneously driven by a Ina-chine of this character, theparticular n'iachine hulls trated in the accompanying drawingsisdesigned for driving four screws at one time;

For this purpose driving bits arejrequiredand the machine, is 'rovidedwithtwo magazines each ofwhich eedsthe screwsit-o two ofthedrivin'gbits. f i Each. of the magazines 13 is rigidly sup ported at oneside of the. standard lyas by a bracket 14. These magazines aresubstantially circular in plan view, and ,eachcomprises an annular sidewall provided with an arch or spider'lfiwhich supports the bearing 16for the spindle 17 upon the lower end portion which isfixed the conical.dial 1.8 having a hub 7; 19 fixed upon said spindle. The dial. 18 isinclined downward t wa its periphery, which is, located inthe samehorizontal plane with {the beveled. annular flange 20 in .the'lowe'r'edgeiof the magazine side wall, and spacedtheretrom 'adistancecorresponding to the diameter of the'jshanks of the screws toJbedepositedtherein;

circumferential edge of the dial is likewise Mounted upon: diametricallyper tions. ofthe sidewall of the smagazine are g5 bearings 24 1 Withinwhich are journaled shafts 25 carrying the circular brushes 226;,

the diameter of each brush being suchthat it will brush back any surplusserewstwhich maybe carried forward by the dial, allowing m' only thosescrews to pass which aregnse] pended by their heads the annular-run way.v 1 A guardring 2 7;is connected totheinner Wall of the magazine,slightlyabove the 1g; flange 20, and extends from apointrbeneath thecenter ot-each brushto' a point just beyond the eo-operating escapemenmecha. nism, which will be later described.

This {guard ring is spaced,

A conrolmrxoner omo.

above the flange and the periphery ofsthe rotating; dial 18, asullicicnt distance to permit the heads of the screws to pass freelybeneath the same when the screws are"hangingrvertically1n thelnnnularrunway,=but is sufiiciently closeto the runway to prevent anyscrews passing beneath the ring excepting those--whiclr are suspended inthe proper position.

Aiworm wheel 28 is carried by each brush shaft and meshes with a worm 29upon a worm shaft 30, each of thesejworm shafts having a spiral gear 31which meshes with a spiral gear 32 upon the magazine drive shaftlocatedtransversely through the machine Q shaftlOQ y Y,

lfllh e upper end ofthemain drive shaft 10 is provided withabevel gear35ffupon the horizontal shaft 36. Acounten shaft 37 is driven from theshaft 36 throughthe -gears 38. A gear 39 is mounteduponthe shaft 37 andmeshes and driven by. thefmain drive with a gear 40 upon the shortvertical shaft shaft 33 through the gear1ng42L p a y p For the purposeof pernuttmg a" discharge 41 {which drives: the

ofrthe pendent screws, one at a time, into the tubes5l3,"wl1icl1' leadto the "chucloi -14, 'an escapement mechanismis provided upon each sideofeach magazine, at points substantially halfway, betweenthe brushes 19.Each escapement mechanism is mounted in a casefetii, which is of channelshape in cross section and connected at its inner end to the lower edge0f the" rnagazine wall. As best illustrated in F igi 5,theseescapement'cases are preferably located at an angle to a radius ofthemiag'azindand the inner end of each case 'isfangularly recessed, asshown at 46,

to rcceiiieftlie,screivs from the annular runway. g i a Ane'scap'ementfinger 47 and a cut-off finger l8 are slidably' mounted Within theescapement case, the finger 47 being provided with the'jcurvedirecess 49at its innereX- tremityto receive the screws, one at a time, as theyenter thegesc'ap'ement ease, whlle the cut-ofl' finger 48 is providedwith the beveled I are provided in ment cains' 56, one ofinnerext'remity 5 0 for the purposeofcutting ofifthe'admission of screwsto (the escapement'case after onescre'w has beenrele'ased bythejescapement finger.

- "The escapement and cut-off fingcrsare renponitheir adj acent fa ces,as indicated sit-51,150 permit of longitudmal movement ofthe fingersupon each 'sideof the cam blade 52, andveiticallydisposedgrooves '53 and5 4; the escapement and cut-off fingers, respectively, toreceive theescape- V which is provided upon each ,sideofthe cam blade-52.

A roller-yoke 57 islocated upon the escape ment casing, the rolleryfi8being journaled therein and engaging the outer edge of the cam blade 52,and anoperating rod 59 is spending in number to the withfa bevel gear34, meshing connected to the upper endof each cam blade and arranged tobe reciprocated, as will be later described.

For the purpose of'operating the screw driving bits a'ishort verticalshaftbO is rotated from the shaft 36, as by the bevel pinionsGlaudprovided at its lower end with a gear 62. This last named gear islocated within a housing (33, supported in front of the standard 1, aplurality ,of sleeves 64, correscrew driver bits, journaled in saidhousing, each of the sleeves being provided with a pinion .65meshing'with the gear 62- f 1 i A shaft G5 is journaled through eachsleeve and provided at its upper portion with a friction disk (37arranged to be normally held in frictional engagement with the triotiondisk 66, upon the upper end of the sleeve, by means of a coil spring 68,whereby motion is transmitted, byfriction, from eachsleeve to the corresJonding shaft 65.

The chucics '44 are carried upon a, rigid b 'acket 70, fixed upon thefront side of the standard Land the screw driving bits 71 are mountedfor rotation and vertical movement within said chucks. The bits arejournalcd in a vertically reciprocating crosshcad '72, and for thepurpose of compensating for variat-ion in thelengths of the screws or adif ference inthe time when the various screws take hold in the materialinto whichthey are being driven, each bit is formed of'two secbeingtions having longitudinal movement there between. p y g The uppersection 73' of each bit is ]01llnaled 1n the crosshead andlha's a sleeve7-1 iixcd to its lower portion, the lower eritremity gagement withthenut 79 in the lowcriend vmeans of a telescoping spindle 80,univ ersalprovided at each" end thereof, whereby the screw driving bits maybespaced; apart in any desired arrangement regardless joints 81 being ofthe location of the spindles 65.

Eachchuck 44 isprovidedwith a vertical bore, in which may be located abushing or filler tnbe'82 withinwhich the corresponding screw drivingbit 71 is rotatably and slidahly located. Each tube or chute43'lead'sfrom the adjacent magazine toone of the chucks,

the bushing being cut awayt'o permit screws from the chute to enter thebore.

The lower end of the bushing or filler tube is extended below the lowerextremity of the said 1 shoulder,

chuck and. provided :with diametrically opposed openings 88 to permitthe entrance of the inturneddower ends 81 ofathetjaws '85.

1, These jaws consist of elongatedystrips of metal fnlcrumedintermediate their extremi ties, as at 86, upon'flanges87 'forlnednponthe sidesofthc chuck. I

a A coilspring 88 is placed between the upper end ofeach jaw andthe'zadjacent side of the chuck to keepthe lowercndsoffthe jaws normallypressing in toward eachother.

Semi-funnel shaped grooves89 areformed I in theyopposing faces of thelower extremities of the jaws, andwhen-a screw is fed to the chuck thescrew threaded "point thereof en ters this fnnnelshaped, opening; andthe jaws are forced apart as the screw is forced down between them bythe hit, the jaws holdingthe screw straight and steadywhile itQis beingdriven into the worln The operating treadle'j90wis pivoted within thestandard 1, as at 91, and intermediate its extremities is pivotallyconnected, as at '92, to a vertical rod 93. A spreader 94 is connectedto the upper end of the rod 93 and two vertical rods 95 are connected attheir lower extremities to opposite ends of the spreader and extendupward through the standard 1, emerging therefrom at a point spaced fromthe top, as through the bearing bosses 96.

i The tie bar 97 is connected to the upper ends of the rods 95 andprovided with 21 depending lug 98 to which is pivoted one end of a lever99, the opposite end thereof being pivoted to a stationary portion ofthe standard as at 100.

A lever 101 is pivoted intermediateits extremities to the upper endof anupright link 102, the lower end of the link being pivotally connected at103m the standard. This lever is connected, at a point between itsfulcrum i and its forward end, to a link 104, the lower end of said linkbeing pivotally connected to the lever 99, intermediate the extremitiesthereof. V p

The forward end ofthe lever 101 is connected to the central portion of atransverse spreaderor cross arm'105, from theextremt ties of whichdepend the rods106, the lower ends of said rods supporting the crosshead72.

weightllO. The Work carrying table 111 is slidably mounted upon guides112, formed upon the front facesof the standard, and may be adjustablysupported-upon the rod 113,

by means of the spiral gearing 114 arranged to be manually adjusted asby the crank 115.

The lower end of the rod 113 is connected to thesubstantially horizontalarm 116 of a bell crank, pivoted at 117 upon the standard,

and .pravl'ided: :with the depending mm 118 having a camsurfaee l ltiatits-upper portion and the arcuate surface 120 at its lower-pert1on,sa1d arc being, substantially drawn from the centcr91. a A roller121,,upon'the trcadle 90, isarranged to engage the surface of thedependingarm '1'18'ofthecrank. v

, With eachdepression of the treadle 90 the work table 111 is raiseduntil the roller J21 rides off -of' the cam surface 119 of,the,- bellcrank, after wliiclrthc roller rides uponthe arcuatc surface 120thereof,:hol ding the table in the raised position. At the same time-theforward-endof the lever 1.01 i-s pulleddown through the rods 93and195and lever 99 and link 104, simultaneously operating all of the each sideof each magazine through the corresponding tube, or chute 13 into voneofthe chucks. At the same time: the screw driver bitsrarejhrought downthrough the chucks,

into engagement with the screws simultaneously driving all of the screwsinto the work.

The compensating means, shown in- Fig. 4 y

of the drawing, allows for any variation in the lengths of the differentscrews or any vaQ riation in the time at which the different screws takehold in the work, thus permitting each screw to be properlydriven homeafter which the friction drive of the screw driving 1 spindles preventsfurther rotation of the spindles.

As the treadle 90 is released, and permitted to raise, the escapementand screw driving mechanism will be raised to the normal position whilethe table will be lowered permitting the finished work to be easilyremoved.

and new work to be placed thereon.

We claim:

1. A screw driving machine including a magazine forcontaining screws, aplurality magazine, a chuck communicating with each escapement means, ascrew driving b t rotatably and slidably located in each chuck,

means for simultaneously operating said es' 7 capement means, to admltscrews to, the

chucks, and lowering the driving bits through the chucks, and means. forcompen sating for variation in the lengths of time to drive the severalscrews.

of escapement means associated with the 2. A screw driving machineincluding a plurality of chucks, a screw driving bit rotatablyandflslidably located in each chuck,

means for simultaneously admitting a screw to each chuck, means forsimultaneously operating all of the bits andmeans for compensating forvariation in the lengths of time a to drive the several screws.

3. A screw driving machine lncludmg a plurality of chucks, a screwdriving bit rotatably and slidably located in each chuck, meansfor-simultaneously admitting a screw to each chuck, means forsimultaneously operating all of the bits and a spring pressedsecerailscrews.

.eapement means to admit screws to the chucks, and. lowering the drivingbits through the 'chueks,and a spring pressed sectionin' each bit' forcompensating for variation in the lengths of time to drive the sev- '5.A'- screw driving machine includin e magazine for containing screwsyaplurality of escapement means associated with the magazine a verticallyreciprocating operatingblade for eaehescapement means, a'chuckcommunicating with each escapement means,

a screw driving bit rotatably and slidably located in each chuck. meansfor simultaneouslyrcciprocating all of said blades and bits, andmeansfor compensating for variation in the lengths of time to drive lheseveral screws.

6. A screw driving machine including a magazine for containing screws, aplurality of escapement means associated with the magazine, arverticallyreciprocating, operating bladefor each escapementmeans, achuck- Tcommunicating with each escapement means, a screw driving bita'otatnblyand slidably located incach chuck, means' for simultaneously loweringall of said blades andbits, and means for compensating for variation inthe lengths, of time to drive the several screws; a a

In testimony that we claim theabove, we have hereunto subscribed ournames.

GRA e. BROWN. 1 GREGORY F. McNULTY.

